/ Dictionary / Index A altitudinal: Meaning and Definition of Find definitions for: al•ti•tu•di•nal Pronunciation: (al"ti-td'n-l, -tyd'-), [key] — adj. relating to altitude or height. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: altitudinal (Thesaurus) altitude sickness alto Related Content Daily Word Quiz: mongrel Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language